nav {
    margin: 27px auto 0;

    position: relative;
    width: 590px;
    height: 50px;
    background-color: #34495e;
    border-radius: 8px;
    font-size: 0;
}
nav a {
    line-height:50px;
    height:100%;
    font-size:15px;
    display:inline-block;
    position:relative;
    z-index:1;
    text-decoration:none;
    text-transform:uppercase;
    text-align:center;
    color:white;
    cursor:pointer;
}
nav .animation {
    position:absolute;
    height:100%;
    top:0;
    transition:all .5s ease 0s;
    border-radius: 8px;
}
a:nth-child(1) {
width: 100px;
}
a:nth-child(2) {
    width: 110px;
}
a:nth-child(3) {
    width: 100px;
}
a:nth-child(4) {
    width: 160px;
}
a:nth-child(5){
    width: 120px;
}
nav .start-home,a:nth-child(1):hover~.animation {
    width: 100px;
    left: 0px;
    background-color: #2BD6B4;
}
nav.start-about,a:nth-child(2):hover~.animation {
    width: 110px;
    left: 100px;
    background-color: #2BD6B4;
}
nav.start-blog,a:nth-child(3):hover~.animation {
    width: 100px;
    left: 210px;
    background-color: #2BD6B4;
}
nav.start-portefolio,a:nth-child(4):hover~.animation {
    width: 160px;
    left: 310px;
    background-color: #2BD6B4;
}
nav.start-contact,a:nth-child(5):hover~.animation {
width: 120px;
left: 470px;
background-color: #2BD6B4;
}
body {
    font-size: 12px;
    font-family: sans-serif;    
    background-color: #2c3e50;
    color: white;
}
span {
    color: #2BD6B4;
}
.MOAS {
    text-align: center;
    margin: 15px;
}
.MOAS p {
    font-size: 15px;
}
.MOAS h4 {
    font-size: 15px;
}
.foot {
  padding-top: 10px;
  padding-bottom: 10px;
}